Offer visa invitation letters for people coming from overseas
An invitation letter can help somebody with their visa application.
If you have international attendees, you may have somebody who needs a visa to come to the conference.
Writing a letter to say somebody is attending or speaking at your conference is a useful service, and may help their visa application. (Sadly, it’s not guaranteed.) Be upfront that this is something you can offer, and tell people how to ask for an invitation letter.
Reply to requests promptly – the wheels of bureaucracy move slowly, and delays may adversely affect somebody’s visa application.
I did the visa invitation letters for PyCon UK 2018 – email me if you’d like our letter template.